19825693 has 2 divisors, whose sum is σ = 19825694. Its totient is φ = 19825692.

The previous prime is 19825669. The next prime is 19825697. The reversal of 19825693 is 39652891.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12659364 + 7166329 = 3558^2 + 2677^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19825693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19825697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9912846 + 9912847.

It is an arithmetic number, because the mean of its divisors is an integer number (9912847).

Almost surely, 2^19825693 is an apocalyptic number.

It is an amenable number.

19825693 is a deficient number, since it is larger than the sum of its proper divisors (1).

19825693 is an equidigital number, since it uses as much as digits as its factorization.

19825693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 43.

The square root of 19825693 is about 4452.6051924688. The cubic root of 19825693 is about 270.6508896288.

The spelling of 19825693 in words is "nineteen million, eight hundred twenty-five thousand, six hundred ninety-three".